Henry, Thanks for looking into this - it was late last night and I wasn't as thorough as Bill Lam was (thanks for the nudge Bill) and didn't look earlier - here is a little update -
JVERSION Engine: j805/j64/darwin Release: commercial/2016-12-11T08:17:56 q=. (50e6 ?.@$ 10){'0123456789' timex 'z=. rl q' 0.828379 603981056 Engine: j807/j64/darwin Release-e: commercial/2019-11-04T12:57:58 q=. (50e6 ?.@$ 10){'0123456789' timex 'z=. rl q' 1.973677 649991296 Engine: j901/j64avx2/darwin Release-c: commercial/2020-01-11T12:24:26 q=. (50e6 ?.@$ 10){'0123456789' timex 'z=. rl q' 6.426628 649995392 Above are run in a 2.7 GHz Intel Core i5 Below is another timing (on a very different machine). But it at least gives your Release-c a factor of 2 faster (in real time ... ;-) j504/2005-03-16/15:30 Running in: Linux Linux version 2.4.20-28.8 (bhcomp...@daffy.perf.redhat.com) (gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)) #1 Thu Dec 18 12:53:39 EST 2003 q=. (50e6 ?.@$ 10){'0123456789' timex 'z=. rl q' 12.9823 3.35545e8 $ cat /proc/cpuinfo processor : 0 (the one and only core) vendor_id : GenuineIntel cpu family : 6 model : 5 model name : Pentium II (Deschutes) stepping : 2 cpu MHz : 399.069 cache size : 512 KB ..... So, the factor of 2 times faster is offset by the processor running at 6.75 times slower clock rate ;-) I'm feeling a little remiss in not paying closer attention during the beta process... 🤷♂️ > On 2020Jan 15, at 17:35, Henry Rich <henryhr...@gmail.com> wrote: > > Fixed for next release. > > Henry Rich > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm